please help, although i know this has been asked before, im lost

A

AC Question

From my desktop computer, I want to add/sync/import, all my Free & Purchased songs (Music) from my Google Play Music library to my already exsisting iTunes account. It seems as though there have been so many different answers to others questions like this but i am getting so confussed. I just want the best, simple, stress free way for this to be done. I am not very computer savy, but i know it cant possibly be as hard as i am making it out to be lol..... Can anyone please kindly help me out? Thank you....